The temperature of star emitting blue light would be less or more… - Vidyadip

Question

The temperature of star emitting blue light would be less or more than the temperature of sun? Also give arguments in favour of your answer.

✓

Answer

According to Wein's law of radiation
$\begin{array}{l}\lambda_{ m } T =\text { Constant } \\ \text { or } T \propto \frac{1}{\lambda_{ m }}\end{array}$
In the light emitted by the sun the intensity of yellow light is maximum. So the sun can be considered to be a yellow coloured star. The wavelength of blue coloured star is less than that of yellow colour. So the temperature of blue coloured star will be more than the temperature of the sun.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from PART - 2 CH - 10 Thermal Properties of Matter→PART - 2 CH - 10 Thermal Properties of Matter — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The string of a tunning fork and a tuning fork are played simultaneously. At length of the wire is kept at 0.49 meter or 0.50 meter. 4 beats per second are heared. what is the frequency of tunning fork?

A man with a wrist watch on his hand falls from the top of a tower. Does the watch give correct time during the free fall?

A refrigerator cools a body cooler than its surroundings. Does this violate the law of conservation of energy?

One person says that the potential energy of a particular book kept in an almirah is 20J and the other says it is 30J. Is one of them necessarily wrong?

Calculate the area of a parallelogram whose adjacent sides are given by the vectors. $\vec{\text{A}}=\hat{\text{i}}+2\hat{\text{j}}+3\hat{\text{k}};\ \vec{\text{B}}=2\hat{\text{i}}-3\hat{\text{j}}+\hat{\text{k}}.$

A parallel beam of light of wavelength 560nm falls on a thin film of oil (refractive index = 1.4). What should be the minimum thickness of the film so that it strongly reflects the light?

Why are the wings of an aeroplane rounded outwards while flattened inwards?

A steel cable with a radius of $1.5cm$ supports a chairlift at a ski area. If the maximum stress is not to exceed $108N m^{-2}$, what is the maximum load the cable can support?

2 cm from a horizontal pipe of unequal bore. At a point of pressure equal to Hg column, water is flowing out at a velocity of $40 cm / sec$. Calculate the pressure at the point where the velocity of water flow is $60 cm / sec$.

Two bar magnets are placed close to each other with their opposite poles facing each other. In absence of other force the magnets are pulled towards each other and their kinetic energy increases. Does it contradict our earher knowledge that magnetic forces cannot do any work and hence cannot increase kinetic energy of a system?